Improvement in machines for seaming metal roofs



N diluted tant- Wire.

JOHN DAWSON JAMES, JR., WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR.

To HIMsnLn, Donn Bonn, Ann JACOB n o. oUrWA'rnR, or NEWARK, New

Jnnsnv. i Y

Letters-Patent No. 100,414fdated March. 1, 1870.

IMPROVEMENT 1N MACHINES Pon ssamm@ METAL Rors.

The Schedule referred to in'these Lettera Patent and making part o! thesame.

b all whomjt 'may concern.- Be it known that I,.JOHN llawvsgnv` JAMES,Jr., of Washington city, and Districtof Columbia,- have invented certainnew and-useful Improvements in Machines for Seaming Metal Roofs; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanying-drawingandrto the letters of rei'- erence marked thereon making part of thisspecification, in whichy Figure 1 is a side wiew, with the guide-plateremoved, the swage-head being raised.

Figure 2is a side vie\v,.with `the guide-plate removed, the swage-lieadbeing down. f

Figure 3 is a side view, with the guide-plate in pov sition.

Figure 4 illustrates the` different stages through which the tin passesin forming the seam-joint.

i tire work, the latter pressing the tin in such position asreadily toaccommodate itself to the-action of the swage, which, by simplydepressing a lever, completes the joint.

The nature of' my invention'consists in securing Iin or forming with asuitable base-block o1` vframe two guide or bearing-plates.

These plates are provided with vertical grooves,

. that lit over theseams and angular slots, in which work projectingpins on the swage or hammer-head,

` and which direct the movement ofthe same, causing it, vin its fall, tomeet the metal at the desired point,

. `and pressing it, as' the swage descends, to such position as tocomplete the seam-joint. l

The .swage has attached `to 4it a plate-handle,

j which is slightly'curved, so as `to afford the desired l sweep.

The swage or hammer is attached to a compound lever, which Works onsuitable fulcrnm-pins or arms secured on theupper face oi' thebase-block.

This device, like lthe tongs, is equally as well ladapted for thevworking of copper and other metals as tin;

To enable others skilled in the art to make and use my invention, I willnow proceed to` describe its construction and operation. y

.seam-j oint.

Mrs-...

A is the base-block o1' frame, and may be constructed of any suitablemetal or wood. This block may be of any desired dimensions.' 'I usuallymake it, say, twelve by fourteen inches.

l The face-plate A of the block projects beyond its main surface, asclearly shown in the drawing.

BB are two metallic guide-plates, These plates may be attached to theblock by screws, as shown in lig. 3; or, when the block is made of castmetal, they may be cast with it.

These plates are formed with two slots-a vertical slot, B', and aninclined slot, b. This slot B enables the instrument to be properly setand adjusted over the seams, so that the swage, by its falling pressure,can form the joint. e

In the inclined slot b work the guide-pins c c.

These pins c c are secured to the swage or hammerhead C, and, projectinglaterally therefrom, pass through the slots b b. The swage orhammer-head G is made of metal or othersuitable material, andsubstantially in the form shown in figs. l and 2. This swage may be ofany desired dimensions. l usually make it, say, from ten to twelve`inches across its'iitce. f n C is the handle of the swage, and isslightly curved in form.

This handle passes through a slot, a, ifu the front of the face-plate A'of the block or base, and is either cast with the swage or otherwisesecured thereto.

D is a straight, and D,`a bent or curved lever. These levers areconnected by a link, el, or the lever D may be slotted, Vas shown at d',iig. 2, and the A lever D secured 'therein by bolt.

The outer end of the lever D' is secured to the swage-handle C', and bywhich means the swage C' is operated, and the necessary pressureapplied.

The operation is as follows:

The seams are turned up, as shown at 1 2, E, fig. 4, 1,*2, 3, F, iig. 4,represent the-condition of the seams after they are pressed by myimproved tongs, or after the flange 3 has been turned down or formed bygroovng-iron and mallet. This is the stage oi' the process at which ,theswage is first applied, the instrument being in theposition shownin fig.1, the vertical slot B fitting over the seams, as shown at G, when, bysimply depressing the lever, the swage C is carried to the positionshown at X, dg. 2, acting on the ilangeA 3, and, by its movement,fore-ing the same down in position, as shown at 4, Gr, thus completingthe first H and K, fig. 4, are a mere l repetition of the process justdescribed as necessary to the formation of the irst seam-joinuwHrepresenting the condition 'of the seams after the second application oftongs,

and K after the second application of the swage.

Having.r thus fully described my invention, What I claim therein as new,and desire to secure by Letters Patent ofthe United States, is-

The base-bleek A, having slotted guide-plates B B, swage C, and handleC', when the same are connected with a system of leverage, as shown, thewhole lJ. D. JAMES, JR.

